供者KIR和受者HLA遗传背景与血缘关系全相合造血干细胞移植预后的关系

目的探索供者抑制性杀伤细胞免疫球蛋白样受体(killer cell immunoglobulin-like re- ceptor,KIR)和受者HLA遗传背景与血缘关系全相合造血干细胞移植(HSCT)预后的关系。方法采用反向序列特异性寡核苷酸探针(RSSOP)和(或)序列特异性引物PCR(PCR-SSP)分型技术检测HLA 基因型,采用PCR-SSP技术检测供者KIR基因型。对59例接受血缘关系HLA-ABDR全相合、非去除 T细胞HSCT的恶性血液病患者病例资料进行回顾性分析。结果Ⅱ-Ⅳ级急性移植物抗宿主病 (aGVHD)发生率在KIR-HLA相容组患者为32％,非相容组患者为78％,两者差异有统计学意义(P= 0．026);Ⅱ-Ⅳ级aGVHD在Bw4相容组患者为24％,Bw4非相容组患者为61％,差异亦有统计学意义(P=0．018)。真菌感染发生率在Bw4相容组患者为14％,Bw4非相容组患者为44％,前者显著低于后者(P=0．028)。髓系疾病中,真菌感染发生率在Bw4相容组与Bw4非相容组患者分别为12％和 80％,前者明显低于后者(P=0．002);C2相容组患者总生存(Overall survival,OS)率显著高于C2非相容组患者(P=0．01)。结论供者KIR和受者HLA遗传背景与血缘HIA全相合HSCT预后与 aGVHD发生率、OS率和真菌感染发生率均有相关关系。供者KIR与受者HLA相容时,受者aGVHD 发生率下降。选择Bw4相容的供者有助于减轻患者aGVHD及真菌感染发生率,选择C2相容的供者有助于提高患者OS率。研究结果为遗传学指标指导下供者优化选择提供分子依据,为临床制定治疗方案提供参考。

Relationship between the genetic background of donor KIR/recipient HLA and the outcomes in HLA identical sibling HSCT

OBJECTIVE: To explore the relationship between the genetic background of donor KIR/recipient HLA and the outcomes in HLA-identical sibling HSCT. METHODS: HLA genotype was determined by polymerase chain reaction-sequence-specific oligonucleotide probes (PCR-SSOP) and/or PCR-sequence-specific primer (PCR-SSP). Donor KIR genotype was determined by PCR-SSP. A retrospective study was carried out to analyze the outcomes of 59 patients with various hematologic malignancies received non T-cell-depleted transplant from HLA-identical sibling donors. RESULTS: Incidence of grade II-IV acute graft-versus-host disease (aGVHD) was significantly lower in patients of KIR/HLA matched group than in KIR/HLA mismatched group (32% vs 78%, P = 0.026). The incidence of grade II-IV aGVHD (24% vs 61%, P = 0.018) and fungus infection (14% vs 44%, P = 0.028) were significantly lower in Bw4 matched group than in Bw4 mismatched group. In myeloid diseases, Bw4 matched patients had much lower incidence of fungus infection (12% vs 80%, P = 0.002) compared with Bw4 mismatched patients, and C2 matched patients had higher overall survival (OS) compared with C2 mismatched patients (P = 0.01). CONCLUSIONS: Donor KIR/recipient HLA genetic background is correlated with the outcomes of HLA-identical sibling HSCT in incidences of grade II-IV aGVHD, fungus infection and OS. KIR/HLA matched patients may have lower incidence of aGVHD. Bw4 matched patients may have lower incidences of aGVHD and fungus infection. C2 matched patients may have longer OS.